Nathaniel metz



(No Model.) l sheets-sheet 1.

' N. METZ.

STEAM BI'LBR. Y N0.v374,688. PatentedDeo. 13, 188'7.

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l (No Model.) 2 Sheets-Sheet 2.

N. METZ.

STEAM B OILER.'

Patenfe-dDemtlS, 1887.v

.NITED STATES PATENT erica.

ASSIGNMENTS, 'TO VILLIAM D. HEEBNER, OF SAME PLAGE.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 374,688, dated December 13, 1887.

Application filed August 12, 1887. Serial No. 246,794. (No model.)

To all whom it may concern.-

Be it known that I, NATHANIEL METZ, a citizen of the United States, residing at Lansdale, Montgomery county, Pennsylvania, have invented certain new and useful Improvements in Steam-Boilers, of which the following is a specification.

This invention relates to steamgenerators, particularly that class adapted to be used for heating purposes; and it consists in certain improvements whereby I am enabled to obtain a very perfect utilization of the heat from the furnace, as will be fully described and pointed out hereinafter.

In the drawings, Figure I is a front end view of the boiler and its supportingcasing. Fig. 2 is a rear end view of' the same. Fig. 3 is a side view of the boiler. Fig. 4 is a perspective view of the boiler. Fig. 5 is a perspective view of one of the deflecting-plates at the front end of' the boiler. Fig. 6 is a section on the line 6 6, Fig. 3, showing one of the boiler-sections in elevation.

A designates the casing in which the boiler is mounted, constructed of brick, masonry, or other suitable non-conducting material, and having situated below it the furnace or firepot, which may be of any desired construction.

The boiler is so supported as to be easily ref movable from the casing, the side walls of which are grooved or provided with ledges a, with which engage flanges carried by the boiler, so that the same vmay be slid endwise into and out of the casing, one or both ends being removable to permit this.

As seen from Figs. 3 and 4, the boiler is made up of hollow sections B, connected in any desired manner, as by short pipe or tube sections b, which also serve to form communicating steam or water passages between the different sections of the boiler. The boilersections are extended upward, as at B, and these are united by tubes b to form a steam-space, from which the steam may be led off' to the place of use. l

Below the boiler is mounted a hollow ring, O, through which the heat, flame, and products of combustion from the furnace pass on their way to the boiler. This ring is connected with the boiler by circulating-pipes c c-preferably one connected with the front section and the other with the rear oneand is connected with the feed or water-supply pipe, as at c', so that the water is heated to a certain extent before passing to the boiler. Each section is formed with a central opening, which,when the sections are united, form a central fire-hue, D, extending from end to end of the boiler. They are also provided with other openings, E E F F, which serve as return-fines through the boiler. Direct communication between these openings, except at the ends, is prevented by thin anges projecting from one end of each section B and abutting against the adjacent end of the next section, those of' the end section which abut against the frontvwall of the casing being illustrated in Fig. 2, while those of the others are seen in Fig. 6.

Referring to the last-mentioned figure, L

designates a curved ange arranged below and I quite lclose to opening D.

K is another curved flange extending around the upper portion of the opening D, but at a greater distance therefrom than flange L, it being arranged close to the inner edges of openings E.

M IWI are two inclined flanges extending from the ends of flange L and projecting outward and upward to the periphery of the boilersection, whence they are extended outward, forming the flanges H,which rest upon the ledges o in the casing-walls, and thus support the boiler.

I I are two iianges concentric with flange L and lying close to the outer face of openings F F, but at some distance from the periphery y of' the boilersection, as-shown in the drawings, each ange I extending from one flange M to the lower connecting-tube, b,- and N is a ange extending from one flange M to the other in proximity to the periphery of the upper portion of the boiler and the steamspace B thereof'.

From the above description and an examination of Fig. 6 it will be seen that opening D is cut off' from the other openings and the outside of the boiler by flanges K, L, and M. Openings E are so cut off by flanges K, M, and N, while openings F are cut off'by flanges I, L, and M. It willbe further observed that the passages formed by openings D E F are not IOO direct; but by reason of the flanges which surround them being placed at some distance from the openings there are enlarged heatingspaces formed between each two sections, which insures that practically the whole surface of each section, including'the steam-space B', is exposed to the direct action of the heated products of combustion, whereas heretofore in boilers of a somewhat similar construction tomine there has been a considerable portion of the ends of each section cut off from direct contact with the heated gases from the furnace. By the arrangement which I have shown-that is, by placing the flanges which bound the openings on the upper sides at'as great a distance as convenient therefrom,while those that are below the openings are close to the edges thereof-I obtain the most economical utilization of the heat, as, the spaces between the sections where the gases come in contact with section ends being in each case above the flue or air-passage, the hottest gases are utilized for this purpose, the danger of pockets containing retained cooler air or gas being avoided.

The ilanges H are continuous from end to end of the boiler and act as cutotfs to prevent the heat from accumulating in the Casing above the boiler, while they assist in giving it proper direction through the boiler.

The flanges I being below the flanges H and set in some distance from the priphery of the boiler permits a much larger portion of each section B to be exposed to the direct influence of the heat of the gases and air as they come from the furnace than were these ilanges set near the edge or periphery of the boiler. The products of combustion pass from the firechamber through the ring C beneath the front portion of the boiler; thence under .the boiler to the rear of the boiler, when they pass up to the central tire-flue, D; thence through this flue to the front of the boiler', where they are directed downward into openings or returnilucs F, through Vwhich they pass to the rear end of the boiler, where they impinge upon the hollow or shell-like detlecting-plates G, which cover the ends of ilues E and F and form a communicating passage between them. These plates turn theproducts of combustion and direct them into flues E, through which they pass to the front of the boiler above flanges H, Where, no iiange or other obstruction intervening, they may pass rearward over the top of the boiler and out through a. smoke-stack. Each section except the rear one is a duplicate of each other section, so that the boiler may be made of any size, or its size added to or taken from, in an easy and simple manner, as will be readily under stood.

The front wall of the casing may be given any well-known or preferred shape to assist in directing the gases from flue D to flues F, it being only necessary that there should be no communication with either the outside of the boiler or with iiues E.

One or more-sets of return-lines than shown might be used, the principle of my invention being equally' applicable, whether one, two, or more return-fines or sets of return-fines be used.

The arrangement of flanges shown may be varied without departing from the principle of my invention, although that shown is the one which I now consider the preferable construction.

Without limiting myself to the precise construction and arrangement of parts shown, I claim-- 1. A hollow boiler-section having flat ends and provided with separate openings, through which the products of combustion are adapted to pass in different directions, said openings being surrounded by a waterspace,'and fianges projecting from one of the end faces f the section surrounding said openings and separating them from each other and situated at a distance therefrom, substantially as described.

2. A hollow boiler-section having several openings adapted to form ues,through which pass the products of combustion in different directions, and having flanges projecting from one face of the section surrounding said openings, but at a distance therefrom and separating them from each other, the flanges above the openings being at a greater distance therefrom than those below, substantially as described.

3. A hollow transverse boiler-section having short water-tube sections b, communicating with the interior thereof, openings passing through the same, but not communicating with the interior, an upward-extended steam-space, D', forming part of said section, and flanges projecting from one of the end faces of the boilersection surrounding the said openings, one of said flanges N being arranged near the periphery of the upper part of the section and of the steam-space D', substantially as described.

4. A sectional central re-fiue steam-genv erator formed of hollow transverse sections connected by water-tubes, each section hav ing an opening for the central ire-ilue, and other openings outside thereof for the return tube or lues, and strips or flanges between adjacent sections separating the diierent fireiiues, such strips or flanges being situated ata dist-ance from the openings, whereby enlarged heating-spaces are formed between the sections, substantially as described.

5. In a steam-generator, the combination of hollow transverse sections connected by water-tubes, each section having reue openings through the same, and strips or flanges surrounding and separating the different dues and arranged between the sections, the strips or flanges which surround each opening being arranged near the lower portion thereof and at a greater distance from the upper portion, where there are formed enlarged heatingspaces between the sections above the fireues, substantially as described.

6. In a steam-generator, the combination of hollow sections B, connected by water-tubes, each section having fire-openings D E F, and flanges I, K, L, M, and N, arranged between 5 the boiler-sections surrounding the said openings, substantially as described.

7. In a steam-boiler having a re-1ue, D, and return-fines, flanges or strips arranged between the end ofthe boiler and the wall of its 1o casing, and surrounding both said flue D and the return-fines, to direct the products of com bustion into the latter, substantially as described.

8. In a steamgenerator having a central fire-flue, D, and two return-fines, E and F, a I5 deecting-plate, G, secured to the end of the boiler and covering fines E and F, between which it forms a communication, substantially as described.

vIn. testimony whereof I have signed my zo name to this specification in the presence of two subscribing witnesses. f

NATHANIEL METZ.

WVitnesses: l

A. D.` JOHNSON, CARRIE E. JOHNSON. 

